ASTM D6660-01e1

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Designation:D6660–01
Standard Test Method for
Freezing Point of Aqueous Ethylene Glycol Base Engine
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Coolants by Automatic Phase Transition Method
This standard is issued under the fixed designation D 6660; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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e NOTE—Definitions, 3.1, was changed to Definitions of Terms Specific to This Standard editorially in April 2007.
1. Scope D 3306 Specification for Glycol Base Engine Coolant for
Automobile and Light-Duty Service
1.1 This test method covers the determination of the freez-
D 6210 Specification for Fully-Formulated Glycol Base
ing point of an aqueous engine coolant solution.
Engine Coolant for Heavy-Duty Engines
1.2 This test method is designed to cover ethylene glycol
base coolants up to a maximum concentration of 60 % (v/v) in
3. Terminology
water; however, theASTM interlaboratory study mentioned in
3.1 Definitions of Terms Specific to This Standard:
12.2 has only demonstrated the test method with samples
3.1.1 automatic phase transition method, n—in this stan-
having a concentration range of 40 to 60 % (v/v) water.
dard, the procedures of automatically cooling an engine
NOTE 1—Where solutions of specific concentrations are to be tested,
coolant sample until solid crystals appear, followed by con-
they shall be prepared from representative samples as directed in Test
trolled warming and recording the temperature at which the
Method D 1176. Secondary phases separating on dilution need not be
crystals redissolve into the liquid phase.
separated.
3.1.2 freezing point, n—the temperature at which crystalli-
NOTE 2—The products may also be marketed in a ready-to-use form
zation begins in the absence of supercooling, or the maximum
(prediluted).
temperature reached immediately after initial crystal formation
1.3 The values stated in SI units are to be regarded as the
in the case of supercooling, or the temperature at which solid
standard. The values given in parenthesis are for information
crystals, formed on cooling, disappear when the temperature of
only.
the specimen is allowed to rise.
1.4 This standard does not purport to address all of the
3.1.3 peltier device, n—a solid state thermoelectric device
safety concerns, if any, associated with its use. It is the
constructed with dissimilar semiconductor materials, config-
responsibility of the user of this standard to establish appro-
ured in such a way that it will transfer heat to and away from
priate safety and health practices and determine the applica-
a test specimen dependent on the direction of electric current
bility of regulatory limitations prior to use.
applied to the device.
2. Referenced Documents
4. Summary of Test Method
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2.1 ASTM Standards:
4.1 Aspecimen is cooled by a Peltier device while continu-
D 1176 Practice for Sampling and Preparing Aqueous So-
ously being illuminated by a light source. The specimen is
lutions of Engine Coolants or Antirusts for Testing Pur-
continuously monitored by an array of optical detectors for the
poses
first formation of crystals. Once the crystals are formed, the
D 1177 Test Method for Freezing Point ofAqueous Engine
specimen is then warmed at controlled rates until all the
Coolants
crystals return to the liquid phase. The detectors are sufficient
in number to ensure that any crystals are detected. The
specimen temperature at which the crystals return to the liquid
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This test method is under the jurisdiction ofASTM Committee D15 on Engine
phase is recorded by the temperature sensor as the freezing
Coolants and is the direct responsibility of Subcommittee D15.03 on Physical
point.
Properties.
Current edition approved April 10, 2001. Published June 2001.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5. Significance and Use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 The freezing point of an engine coolant indicates the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. coolant freeze protection.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6660–01
5.2 The freezing point of an engine coolant may be used to 8.3 Turn on the liquid cooling media.
determine the approximate glycol content, provided the glycol 8.4 Turnonthemainpowerswitchoftheanalyzer.Afterthe
type is known. automatic self diagnostics start-up sequence is completed, the
5.3 Freezing point as measured by Test Method D 1177 or instrument will display a “READY”
...